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Open AccessJournal ArticleDOI

Antibody cocktail to SARS-CoV-2 spike protein prevents rapid mutational escape seen with individual antibodies.

TLDR
This work investigated the development of resistance against four antibodies to the spike protein that potently neutralize SARS-CoV-2, individually as well as when combined into cocktails.
Abstract
Antibodies targeting the spike protein of severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) present a promising approach to combat the coronavirus disease 2019 (COVID-19) pandemic; however, concerns remain that mutations can yield antibody resistance. We investigated the development of resistance against four antibodies to the spike protein that potently neutralize SARS-CoV-2, individually as well as when combined into cocktails. These antibodies remain effective against spike variants that have arisen in the human population. However, novel spike mutants rapidly appeared after in vitro passaging in the presence of individual antibodies, resulting in loss of neutralization; such escape also occurred with combinations of antibodies binding diverse but overlapping regions of the spike protein. Escape mutants were not generated after treatment with a noncompeting antibody cocktail.

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Clinical Application of Antibody Immunity Against SARS-CoV-2: Comprehensive Review on Immunoassay and Immunotherapy

TL;DR: In this article , a review of the current scientific evidence for immunoassay, which includes multiple methods of detecting antigen and antibody against SARS-CoV-2, is presented.
Journal ArticleDOI

Fc-Independent Protection from SARS-CoV-2 Infection by Recombinant Human Monoclonal Antibodies

TL;DR: In this paper, two highly potent SARS-CoV-2 neutralizing human monoclonal antibodies, MD65 and BLN1 that target distinct domains of the spike (RBD and NTD), were used to study the role of Fc-dependent activation of effector cells and the complement system.
Journal ArticleDOI

Inhibition of major histocompatibility complex-I antigen presentation by sarbecovirus ORF7a proteins

TL;DR: It is shown that severe acute respiratory syndrome coronavirus-2 (SARS-CoV-2) uses an accessory protein ORF7a to interfere with the formation of peptide-major histocompatibility complex class-I complexes, prevent their movement to the cell surface, and thus inhibit antigen presentation to cytotoxic T cells.
Journal ArticleDOI

Therapeutic Role of Neutralizing Antibody for the Treatment against SARS-CoV-2 and Its Emerging Variants: A Clinical and Pre-Clinical Perspective

TL;DR: The potent neutralizing antibodies have eliminated many of the common problems posed by several other therapeutics and their efficacy for the mutant variants of the SARS-CoV-2 virus in minimizing viral virulence is discussed.
Posted ContentDOI

A case series of SARS-CoV-2 reinfections caused by the variant of concern Gamma in Brazil

TL;DR: In this article, the authors describe 25 cases of SARS-CoV-2 reinfection confirmed by real-time RT-PCR twice within months apart in Brazil and demonstrate that the VOC Gamma was associated with reinfections during the second Brazilian epidemic wave in 2021 and raised concern about the potential infectiousness of reinfected subjects.
References
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Journal ArticleDOI

Structural basis for the recognition of SARS-CoV-2 by full-length human ACE2.

TL;DR: Cryo–electron microscopy structures of full-length human ACE2 in the presence of the neutral amino acid transporter B0AT1 with or without the receptor binding domain (RBD) of the surface spike glycoprotein of SARS-CoV-2 are presented, providing important insights into the molecular basis for coronavirus recognition and infection.
Journal ArticleDOI

Structural and Functional Basis of SARS-CoV-2 Entry by Using Human ACE2.

TL;DR: The crystal structure of the C-terminal domain of SARS-CoV-2 (SARS- coV- 2-CTD) spike (S) protein in complex with human ACE2 (hACE2) is presented, which reveals a hACE2-binding mode similar overall to that observed for SARS -CoV.
Journal ArticleDOI

Cross-neutralization of SARS-CoV-2 by a human monoclonal SARS-CoV antibody.

TL;DR: Several monoclonal antibodies that target the S glycoprotein of SARS-CoV-2, which was identified from memory B cells of an individual who was infected with severe acute respiratory syndrome coronavirus (SARS- coV) in 2003, and one antibody (named S309) potently neutralization, which may limit the emergence of neutralization-escape mutants.
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